I have this configuration in my webapp:

The DAO layer:

<!-- Hibernate SessionFactory -->
 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
 <property name="dataSource" ref="dataSource"/>
 <property name="configurationClass">
 <value>org.hibernate.cfg.AnnotationConfiguration</value>
 </property>
 <property name="configLocation" value="classpath:hibernate.cfg.xml"/>
 <property name="hibernateProperties">
 <value>
 hibernate.dialect=${hibernate.dialect}
 hibernate.query.substitutions=true 'Y', false 'N'
 </value>
 </property>
 </bean>
<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) -->
 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
 <property name="sessionFactory" ref="sessionFactory"/>
 </bean>

 <bean id="abstractDao" abstract="true">
 <property name="sessionFactory" ref="sessionFactory"/>
 </bean>

and then i reference the sessionFactory when it's needed.
I use annotations and not hibernate validation, when i run my application in another web server, there are no problems, but in jboss, the next exception allways occurs:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in URL [jar:file:/C:/java/jboss-4.0.3SP1/server/default/tmp/deploy/tmp1447mamba-webapp-1.0-M1-SNAPSHOT-exp.war/WEB-INF/lib/mamba-core-1.0-M1-SNAPSHOT.jar!/applicationContext-dao.xml]: Invocation of init method failed; nested exception is java.lang.ClassCastException: org.hibernate.validator.event.ValidateEventListener
Caused by:
java.lang.ClassCastException: org.hibernate.validator.event.ValidateEventListener
 at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:783)

what's the reason of this problem? i don't like to use hibernate annotations, i'm using spring modules validation annotations, i think that jboss don't make nothing more than tomcat in this case.
Can someone help me?
Thanks.